The purpose of this study is to examine the effects of intention in other members' defecting behavior on emotional states and decision in a social dilemma. People may appraise circumstances differently depending on what causes an undesirable event such as inequity of outcomes in a social dilemma. Thus, they may behave differently to cope with the situation. It is hypothesized that the causal attribution of inequity to intentional defection will arouse negative feeling states more strongly and promote defection. On the other hand, such tendency may not be so salient in cases where inequity is due to a system or the structure which they are in. Perceived inequity and intention was manipulated by defecting behaviorof a bogus member created through a computer program. In the experiment, all subjects were in the underprivileded status and were asked how much he/she contribute for the common good on each trial. The results supported the predictions.
